Refactor command error messages

build.gradle

@@ -45,6 +45,7 @@ task coverage(type: JacocoReport) {
 }
 
 dependencies {
+//    classpath "com.github.johnrengelman.shadow:7.1.2"
     String jUnitVersion = '5.4.0'
     String javaFxVersion = '17.0.7'
 
@@ -79,6 +80,17 @@ dependencies {
 
 shadowJar {
     archiveFileName = 'AgentAssist.jar'
+    zip64 = true
+    minimize()
+    exclude('**/META-INF/*.SF', '**/META-INF/*.DSA', '**/META-INF/*.RSA')
+    exclude('**/*.md') // Markdown files
+    exclude('**/*.txt') // Text files
+//    exclude('**/*.png', '**/*.jpg') // Images, if not required
+    exclude('**/docs/**')
+    exclude('**/src/test/**')
+}
+task analyzeJar(type: Copy) {
+    from(zipTree(file('build/libs/AgentAssist.jar')))
+    into 'build/analyzedJar'
 }
-
 defaultTasks 'clean', 'test'

src/main/java/seedu/address/commons/util/PrefixCheckResult.java

@@ -0,0 +1,32 @@
+package seedu.address.commons.util;
+
+import java.util.List;
+
+import seedu.address.logic.parser.Prefix;
+
+/**
+ * Contains the results of checking for missing prefixes.
+ */
+public class PrefixCheckResult {
+    private final boolean isAllPrefixPresent;
+    private final List<Prefix> missingPrefixes;
+
+    /**
+     * Constructs a {@code PrefixCheckResult} object.
+     * @param isAllPrefixPresent boolean value that is true when all mandatory prefixes are present.
+     * @param missingPrefixes a {@code List} object that contains all the missing prefixes in the invalid add command.
+     */
+    public PrefixCheckResult(boolean isAllPrefixPresent, List<Prefix> missingPrefixes) {
+        this.isAllPrefixPresent = isAllPrefixPresent;
+        this.missingPrefixes = missingPrefixes;
+    }
+
+    public boolean isAllPrefixPresent() {
+        return this.isAllPrefixPresent;
+    }
+
+    public List<Prefix> getMissingPrefixes() {
+        return this.missingPrefixes;
+    }
+
+}

src/main/java/seedu/address/logic/commands/AddCommand.java

@@ -24,18 +24,22 @@ public class AddCommand extends Command {
 
     public static final String COMMAND_WORD = "add";
 
-    public static final String MESSAGE_USAGE = COMMAND_WORD + ": Adds a person to the address book. "
-            + "Parameters: "
-            + PREFIX_NAME + "NAME "
-            + PREFIX_PHONE + "PHONE "
-            + PREFIX_EMAIL + "EMAIL "
-            + PREFIX_ADDRESS + "ADDRESS "
-            + PREFIX_JOB + "JOB "
-            + PREFIX_INCOME + "INCOME "
-            + "[" + PREFIX_TIER + "TIER]...\n"
-            + "[" + PREFIX_NEW_REMARK + "NEW REMARK]..."
-            + "[" + PREFIX_STATUS + "STATUS]...\n"
-            + "Example: " + COMMAND_WORD + " "
+    public static final String MISSING_PREFIX_MESSAGE_START = "The following mandatory prefixes are missing: ";
+
+    public static final String MESSAGE_USAGE = COMMAND_WORD + ": Adds a person to the address book.\n"
+            + "Required Parameters: "
+            + PREFIX_NAME + " NAME "
+            + PREFIX_PHONE + " PHONE "
+            + PREFIX_EMAIL + " EMAIL "
+            + PREFIX_ADDRESS + " ADDRESS "
+            + PREFIX_JOB + " JOB "
+            + PREFIX_INCOME + " INCOME\n"
+            + "Optional Parameters: "
+            + "[" + PREFIX_TIER + " TIER] "
+            + "[" + PREFIX_NEW_REMARK + " NEW REMARK] "
+            + "[" + PREFIX_STATUS + " STATUS] \n"
+            + "Example Usage: '"
+            + COMMAND_WORD + " "
             + PREFIX_NAME + "John Doe "
             + PREFIX_PHONE + "98765432 "
             + PREFIX_EMAIL + "[email protected] "
@@ -44,7 +48,8 @@ public class AddCommand extends Command {
             + PREFIX_INCOME + "300 "
             + PREFIX_TIER + "GOLD "
             + PREFIX_NEW_REMARK + "He is very smart "
-            + PREFIX_STATUS + "NON_URGENT";
+            + PREFIX_STATUS + "NON_URGENT"
+            + "'";
 
     public static final String MESSAGE_SUCCESS = "New person added: %1$s";
     public static final String MESSAGE_DUPLICATE_PERSON = "This person already exists in the address book";

src/main/java/seedu/address/logic/commands/CommandCommons.java

@@ -1,5 +1,9 @@
 package seedu.address.logic.commands;
 
+import java.util.Set;
+import java.util.function.Supplier;
+
+import seedu.address.logic.parser.exceptions.ParseException;
 import seedu.address.model.person.Person;
 
 /**
@@ -11,4 +15,38 @@ public final class CommandCommons {
     public static final String DEFAULT_STATUS = "NONE";
     public static final Person EMPTY_PERSON = null;
 
+    /**
+     * A functional interface similar to {@link Supplier}, but allows for a checked exception, {@code ParseException}
+     * to be thrown.
+     * @param <T> The return type of the method supplied by this supplier.
+     */
+    @FunctionalInterface
+    public interface ThrowingSupplier<T> {
+        T get() throws ParseException;
+    }
+
+    /**
+     * Used to parse a field in a command, and if there are problems with the field, add the resulting error message
+     * to a {@link Set}, to be displayed to the user
+     * @param <T> The attribute type to be parsed
+     * @param parserMethod A lambda expression that contains a method, that when run can either return the parsed value
+     *                     or throws a {@code ParseException}
+     * @param errors A {@link Set} that contains the error messages
+     * @return The parsed value or null
+     */
+    public static <T> T parseField(ThrowingSupplier<? extends T> parserMethod, Set<String> errors) {
+        try {
+            return parserMethod.get();
+        } catch (ParseException e) {
+            errors.add(e.getMessage());
+            return null;
+        }
+    }
+
+    public static String getErrorMessage(Set<String> errors) {
+        StringBuilder accumulatedErrors = new StringBuilder();
+        errors.forEach(error -> accumulatedErrors.append(error + "\n"));
+        return accumulatedErrors.toString().trim();
+    }
+
 }

src/main/java/seedu/address/logic/commands/EditCommand.java

@@ -44,20 +44,21 @@ public class EditCommand extends Command {
     public static final String MESSAGE_USAGE = COMMAND_WORD + ": Edits the details of the person identified "
             + "by the index number used in the displayed person list. "
             + "Existing values will be overwritten by the input values. Any fields unspecified will not be modified.\n"
-            + "Parameters: INDEX (must be a positive integer) "
-            + "[" + PREFIX_NAME + "NAME] "
-            + "[" + PREFIX_PHONE + "PHONE] "
-            + "[" + PREFIX_EMAIL + "EMAIL] "
-            + "[" + PREFIX_ADDRESS + "ADDRESS] "
-            + "[" + PREFIX_JOB + "JOB] "
-            + "[" + PREFIX_INCOME + "INCOME] "
-            + "[" + PREFIX_TIER + "TIER]...\n"
-            + "[" + PREFIX_NEW_REMARK + "NEW REMARK] "
-            + "[" + PREFIX_APPEND_REMARK + "ADD-ON TO EXISTING REMARK] "
-            + "[" + PREFIX_STATUS + "STATUS] "
-            + "Example: " + COMMAND_WORD + " 1 "
+            + "Required Parameters: INDEX (must be a positive integer)\n"
+            + "Optional Parameters: "
+            + "[" + PREFIX_NAME + " NAME] "
+            + "[" + PREFIX_PHONE + " PHONE] "
+            + "[" + PREFIX_EMAIL + " EMAIL] "
+            + "[" + PREFIX_ADDRESS + " ADDRESS] "
+            + "[" + PREFIX_JOB + " JOB] "
+            + "[" + PREFIX_INCOME + " INCOME] "
+            + "[" + PREFIX_TIER + " TIER] "
+            + "[" + PREFIX_NEW_REMARK + " NEW REMARK] "
+            + "[" + PREFIX_APPEND_REMARK + " ADD-ON TO EXISTING REMARK] "
+            + "[" + PREFIX_STATUS + " STATUS] \n"
+            + "Example Usage: '" + COMMAND_WORD + " 1 "
             + PREFIX_PHONE + "91234567 "
-            + PREFIX_EMAIL + "[email protected]";
+            + PREFIX_EMAIL + "[email protected]'";
 
     public static final String MESSAGE_EDIT_PERSON_SUCCESS = "Edited Person: %1$s";
     public static final String MESSAGE_NOT_EDITED = "At least one field to edit must be provided.";

src/main/java/seedu/address/logic/commands/FilterCommand.java

@@ -20,8 +20,8 @@ public class FilterCommand extends Command {
     public static final String MESSAGE_USAGE = COMMAND_WORD + ": Searches for all customers whose specified field "
             + "contains the given substring (case-insensitive) and displays the results in a numbered list.\n"
             + "Parameters: <FLAG>/ <SEARCH TERM>\n"
-            + "Flags: n/ (name), p/ (phone), e/ (email), a/ (address), j/ (job), r/ (remarks)\n"
-            + "Example: " + COMMAND_WORD + " n/ Alice" + " p/ 91112222\n"
+            + "Flags: n/ NAME, p/ PHONE, e/ EMAIL, a/ ADDRESS, j/ JOB, r/ REMARK\n"
+            + "Example: '" + COMMAND_WORD + " n/ Alice" + " p/ 91112222'\n"
             + "This will find all customers whose names contain 'Alice' and whose phone number is '91112222'.";
 
     private final Predicate<Person> predicate;

src/main/java/seedu/address/logic/parser/AddCommandParser.java

@@ -1,18 +1,25 @@
 package seedu.address.logic.parser;
 
 import static seedu.address.logic.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
+import static seedu.address.logic.commands.CommandCommons.getErrorMessage;
+import static seedu.address.logic.commands.CommandCommons.parseField;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_ADDRESS;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_EMAIL;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_INCOME;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_JOB;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_NAME;
-import static seedu.address.logic.parser.CliSyntax.PREFIX_NEW_REMARK;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_PHONE;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_REMARK;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_STATUS;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_TIER;
 
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+import seedu.address.commons.util.PrefixCheckResult;
 import seedu.address.logic.commands.AddCommand;
 import seedu.address.logic.commands.CommandCommons;
 import seedu.address.logic.parser.exceptions.ParseException;
@@ -32,6 +39,7 @@
  */
 public class AddCommandParser implements Parser<AddCommand> {
 
+
     /**
      * Parses the given {@code String} of arguments in the context of the AddCommand
      * and returns an AddCommand object for execution.
@@ -41,37 +49,54 @@ public class AddCommandParser implements Parser<AddCommand> {
     public AddCommand parse(String args) throws ParseException {
         ArgumentMultimap argMultimap =
                 ArgumentTokenizer.tokenize(args, PREFIX_NAME, PREFIX_PHONE, PREFIX_EMAIL, PREFIX_ADDRESS, PREFIX_JOB,
-                        PREFIX_INCOME, PREFIX_TIER, PREFIX_NEW_REMARK, PREFIX_STATUS);
-
-        if (!arePrefixesPresent(argMultimap, PREFIX_NAME, PREFIX_ADDRESS, PREFIX_JOB, PREFIX_PHONE, PREFIX_EMAIL,
-                PREFIX_INCOME)
-                || !argMultimap.getPreamble().isEmpty()) {
+                        PREFIX_INCOME, PREFIX_TIER, PREFIX_REMARK, PREFIX_STATUS);
+        PrefixCheckResult prefixCheckResult = arePrefixesPresent(argMultimap, PREFIX_NAME, PREFIX_ADDRESS,
+                PREFIX_JOB, PREFIX_PHONE, PREFIX_EMAIL, PREFIX_INCOME);
+        if (!prefixCheckResult.isAllPrefixPresent()) {
+            String missingPrefixMessage = AddCommand.MISSING_PREFIX_MESSAGE_START
+                    + prefixCheckResult.getMissingPrefixes();
+            throw new ParseException(missingPrefixMessage + "\n" + String.format(MESSAGE_INVALID_COMMAND_FORMAT,
+                    AddCommand.MESSAGE_USAGE));
+        } else if (!argMultimap.getPreamble().isEmpty()) {
             throw new ParseException(String.format(MESSAGE_INVALID_COMMAND_FORMAT, AddCommand.MESSAGE_USAGE));
         }
-
         argMultimap.verifyNoDuplicatePrefixesFor(PREFIX_NAME, PREFIX_PHONE, PREFIX_EMAIL, PREFIX_ADDRESS, PREFIX_JOB,
-                PREFIX_INCOME, PREFIX_TIER, PREFIX_NEW_REMARK, PREFIX_STATUS);
-        Name name = ParserUtil.parseName(argMultimap.getValue(PREFIX_NAME).get());
-        Phone phone = ParserUtil.parsePhone(argMultimap.getValue(PREFIX_PHONE).get());
-        Email email = ParserUtil.parseEmail(argMultimap.getValue(PREFIX_EMAIL).get());
-        Address address = ParserUtil.parseAddress(argMultimap.getValue(PREFIX_ADDRESS).get());
-        Job job = ParserUtil.parseJob(argMultimap.getValue(PREFIX_JOB).get());
-        Income income = ParserUtil.parseIncome(argMultimap.getValue(PREFIX_INCOME).get());
-        Tier tier = ParserUtil.parseTier(argMultimap.getValue(PREFIX_TIER).orElse(CommandCommons.DEFAULT_TIER));
-        Remark remark = ParserUtil.parseNewRemark(argMultimap.getValue(PREFIX_NEW_REMARK)
-                .orElse(CommandCommons.DEFAULT_REMARK));
-        Status status =
-                ParserUtil.parseStatus(argMultimap.getValue(PREFIX_STATUS).orElse(CommandCommons.DEFAULT_STATUS));
+                PREFIX_INCOME, PREFIX_TIER, PREFIX_REMARK, PREFIX_STATUS);
+        Set<String> errors = new LinkedHashSet<>();
+        Name name = parseField(() -> ParserUtil.parseName(argMultimap.getValue(PREFIX_NAME).get()), errors);
+        Phone phone = parseField(() -> ParserUtil.parsePhone(argMultimap.getValue(PREFIX_PHONE).get()), errors);
+        Email email = parseField(() -> ParserUtil.parseEmail(argMultimap.getValue(PREFIX_EMAIL).get()), errors);
+        Address address = parseField(() -> ParserUtil.parseAddress(argMultimap.getValue(PREFIX_ADDRESS).get()),
+                errors);
+        Job job = parseField(() -> ParserUtil.parseJob(argMultimap.getValue(PREFIX_JOB).get()), errors);
+        Income income = parseField(() -> ParserUtil.parseIncome(argMultimap.getValue(PREFIX_INCOME).get()),
+                errors);
+        Tier tier = parseField(() -> ParserUtil.parseTier(argMultimap.getValue(PREFIX_TIER)
+                .orElse(CommandCommons.DEFAULT_TIER)), errors);
+        Remark remark = parseField(() -> ParserUtil.parseRemark(argMultimap.getValue(PREFIX_REMARK)
+                .orElse(CommandCommons.DEFAULT_REMARK)), errors);
+        Status status = parseField(() -> ParserUtil.parseStatus(argMultimap.getValue(PREFIX_STATUS)
+                .orElse(CommandCommons.DEFAULT_STATUS)), errors);
+        if (!errors.isEmpty()) {
+            throw new ParseException(String.format(MESSAGE_INVALID_COMMAND_FORMAT,
+                    getErrorMessage(errors) + "\n" + AddCommand.MESSAGE_USAGE));
+        }
         Person person = new Person(name, phone, email, address, job, income, tier, remark, status);
         return new AddCommand(person);
     }
 
+
+
     /**
-     * Returns true if none of the prefixes contains empty {@code Optional} values in the given
+     * Returns {@code PrefixCheckResult} if none of the prefixes contains empty {@code Optional} values in the given
      * {@code ArgumentMultimap}.
      */
-    private static boolean arePrefixesPresent(ArgumentMultimap argumentMultimap, Prefix... prefixes) {
-        return Stream.of(prefixes).allMatch(prefix -> argumentMultimap.getValue(prefix).isPresent());
+    private static PrefixCheckResult arePrefixesPresent(ArgumentMultimap argumentMultimap, Prefix... prefixes) {
+        List<Prefix> listOfMissingPrefixes = Stream.of(prefixes)
+                .filter(prefix -> !argumentMultimap.getValue(prefix).isPresent())
+                .collect(Collectors.toList());
+        boolean isAllPrefixPresent = listOfMissingPrefixes.isEmpty();
+        return new PrefixCheckResult(isAllPrefixPresent, listOfMissingPrefixes);
     }
 
 }

src/main/java/seedu/address/logic/parser/EditCommandParser.java

@@ -2,6 +2,8 @@
 
 import static java.util.Objects.requireNonNull;
 import static seedu.address.logic.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
+import static seedu.address.logic.commands.CommandCommons.getErrorMessage;
+import static seedu.address.logic.commands.CommandCommons.parseField;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_ADDRESS;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_APPEND_REMARK;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_EMAIL;
@@ -13,6 +15,9 @@
 import static seedu.address.logic.parser.CliSyntax.PREFIX_STATUS;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_TIER;
 
+import java.util.LinkedHashSet;
+import java.util.Set;
+
 import seedu.address.commons.core.index.Index;
 import seedu.address.logic.Messages;
 import seedu.address.logic.commands.EditCommand;
@@ -53,38 +58,52 @@ public EditCommand parse(String args) throws ParseException {
                 PREFIX_INCOME, PREFIX_JOB, PREFIX_TIER, PREFIX_NEW_REMARK, PREFIX_APPEND_REMARK, PREFIX_STATUS);
 
         EditPersonDescriptor editPersonDescriptor = new EditPersonDescriptor();
-
+        Set<String> errors = new LinkedHashSet<>();
         if (argMultimap.getValue(PREFIX_NAME).isPresent()) {
-            editPersonDescriptor.setName(ParserUtil.parseName(argMultimap.getValue(PREFIX_NAME).get()));
+            editPersonDescriptor.setName(
+                    parseField(() -> ParserUtil.parseName(argMultimap.getValue(PREFIX_NAME).get()), errors));
         }
         if (argMultimap.getValue(PREFIX_PHONE).isPresent()) {
-            editPersonDescriptor.setPhone(ParserUtil.parsePhone(argMultimap.getValue(PREFIX_PHONE).get()));
+            editPersonDescriptor.setPhone(
+                    parseField(() -> ParserUtil.parsePhone(argMultimap.getValue(PREFIX_PHONE).get()), errors));
         }
         if (argMultimap.getValue(PREFIX_EMAIL).isPresent()) {
-            editPersonDescriptor.setEmail(ParserUtil.parseEmail(argMultimap.getValue(PREFIX_EMAIL).get()));
+            editPersonDescriptor.setEmail(
+                    parseField(() -> ParserUtil.parseEmail(argMultimap.getValue(PREFIX_EMAIL).get()), errors));
         }
         if (argMultimap.getValue(PREFIX_ADDRESS).isPresent()) {
-            editPersonDescriptor.setAddress(ParserUtil.parseAddress(argMultimap.getValue(PREFIX_ADDRESS).get()));
+            editPersonDescriptor.setAddress(
+                    parseField(() -> ParserUtil.parseAddress(argMultimap.getValue(PREFIX_ADDRESS).get()),
+                            errors));
         }
         if (argMultimap.getValue(PREFIX_JOB).isPresent()) {
-            editPersonDescriptor.setJob(ParserUtil.parseJob(argMultimap.getValue(PREFIX_JOB).get()));
+            editPersonDescriptor.setJob(parseField(() -> ParserUtil.parseJob(argMultimap.getValue(PREFIX_JOB).get()),
+                    errors));
         }
         if (argMultimap.getValue(PREFIX_INCOME).isPresent()) {
-            editPersonDescriptor.setIncome(ParserUtil.parseIncome(argMultimap.getValue(PREFIX_INCOME).get()));
+            editPersonDescriptor.setIncome(parseField(() -> ParserUtil.parseIncome(
+                    argMultimap.getValue(PREFIX_INCOME).get()), errors));
         }
         if (argMultimap.getValue(PREFIX_TIER).isPresent()) {
-            editPersonDescriptor.setTier(ParserUtil.parseTier(argMultimap.getValue(PREFIX_TIER).get()));
+            editPersonDescriptor.setTier(parseField(() -> ParserUtil.parseTier(
+                    argMultimap.getValue(PREFIX_TIER).get()), errors));
         }
         if (argMultimap.getValue(PREFIX_NEW_REMARK).isPresent()) {
-            editPersonDescriptor.setNewRemark(ParserUtil.parseNewRemark(argMultimap.getValue(PREFIX_NEW_REMARK).get()));
+            editPersonDescriptor.setNewRemark(parseField(() -> ParserUtil.parseNewRemark(
+                    argMultimap.getValue(PREFIX_NEW_REMARK).get()), errors));
         }
         if (argMultimap.getValue(PREFIX_APPEND_REMARK).isPresent()) {
-            editPersonDescriptor.setAppendedRemark(ParserUtil.parseNewRemark(
-                    argMultimap.getValue(PREFIX_APPEND_REMARK).get()));
+            editPersonDescriptor.setAppendedRemark(parseField(() -> ParserUtil.parseNewRemark(
+                    argMultimap.getValue(PREFIX_APPEND_REMARK).get()), errors));
         }
         if (argMultimap.getValue(PREFIX_STATUS).isPresent()) {
-            editPersonDescriptor.setStatus((ParserUtil.parseStatus(
-                    argMultimap.getValue(PREFIX_STATUS).get())));
+            editPersonDescriptor.setStatus(parseField(() -> ParserUtil.parseStatus(
+                    argMultimap.getValue(PREFIX_STATUS).get()), errors));
+        }
+
+        if (!errors.isEmpty()) {
+            throw new ParseException(String.format(MESSAGE_INVALID_COMMAND_FORMAT,
+                    getErrorMessage(errors)));
         }
 
         if (!editPersonDescriptor.isAnyFieldEdited()) {